https://bugs.winehq.org/show_bug.cgi?id=38420
--- Comment #11 from Paul Bredbury brebs@sent.com --- Hi, I've just tried this in Void Linux with Void's vanilla Wine 6.20 package ( https://github.com/void-linux/void-packages/tree/master/srcpkgs/wine ), and the issue still exists.
It's subtle, but certainly present - the mouse must be moved *slowly* in one direction (left or right are the easiest directions to test) for a while, and then it starts moving at about a third of its expected pace, whereas moving it in the opposite direction again is full-speed.